This screw-in piston converter by Montblanc has been designed to fit their classique size Meisterstück fountain pens. The unique device allows you to use ink bottles to fill the pen rather than individual ink cartridges that have to be thrown away after use. The converter features a screw-in design to help hold it securely inside the pen to give your greater peace of mind. To fill your pen with this converter, simply dip the nib in the ink bottle and twist the black end of the converter till you see ink being drawn into the barrel. Once full, you are free to write with your pen.

*Suitable for Montblanc Meisterstück Classique.